Excessive sweating during sleep, often called night sweats, can be caused by various factors including environmental, lifestyle, medical, and psychological reasons. Common causes include:

• Drinking alcohol before bedtime, which raises body temperature and heart rate.
• Stress and anxiety, which activate the body's stress response causing sweating.
• Sleep environment factors such as heavy or non-breathable bedding and warm rooms.
• Hormonal imbalances including menopause and thyroid disorders affecting body temperature regulation.
• Certain medications like antidepressants, steroids, or painkillers.
• Medical conditions such as infections, diabetes (low blood sugar), hyperhidrosis (a condition causing excessive sweating), or other illnesses.
• Eating spicy foods or exercising too close to bedtime.

If night sweating is frequent, severe, or accompanied by other symptoms like fever or unexplained weight loss, consulting a healthcare professional is important for proper diagnosis and treatment. Adjusting sleepwear, bedding, room temperature, and managing stress can help reduce sweating at night.